William e



(No Model.)

W. E. BLAKSLEE.

YOKED PROG. No. 309,921. i Patented Dep. 30. 1884.

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NTTED STATES VPATENT ErrcE.

WILLIAM E. ELAKsLEE, OE HILLBUEN, NEW YOEN, AssieNOE To THE EAMPO IRON wOEKs, OE sAME PLAGE.

YOKED FROG.

SPECIFICATION forming part of Letters Patent No. 309,921, dated December 30,1884.

l Application filed May 21, 18S-1. (No model.)

To all whom t may concern.-

Be it known that I, W'ILLIAM E. BLAKsLEE, a citizen of the United States, residing at Hillburn, in the county of Rockland 'and State of New York, have invented certain new and useful Improvements in Yoked Frogs, of which the following is a specification.

My invention consists in means, fully described hereinafter, whereby to firmly and rigidly connect the various parts constituting` a railroad-frog without interfering with their ready detachment when it is necessary to disconnect them.

In the drawings, Figure l is a-plan view of a railway-frog embodying myinvention. Fig. 2 is a cross-section on the line l 2, Fig. l. Fig. 8 is a cross-section on the line 3 4, Fig. l; and Fig. 4 is a sectional plan on the line 5 6, Fig. 2.

rlhe frog may be built up of sections of track and filling-pieces in any usual manner, as shown. The point consists of the couverging rails A B,reduced at the ends and brought together and secured by the bolts a c, and the side rails, C D, are curved and arranged upon opposite sides of the point, with the interposed iilling-pieces b brecessed, as shown, to receive the ends of the terminal bolts c. The parts thus arranged are held in their relative position by means of yokes E E, each consisting of a straight fiat crossbar, d, and bent ends c, each of which is bulged outwardly, or otherwise formed, so as to secure an interior socket, x, adapted to the curved Outer face of a block, G, which is confined between the end of the yoke and the Outer face Of the web of the adjacent rail C Or D.

To apply the yokes and blocks the latter may be placed in position against the rails at about the point e', where the rails are nearest together. The yoke may be then applied and, with the blocks, carried Outward toward the wider end of the frog until the parts can be carried n o farther, the wedge-like action of the yoke and blocks tending to clamp all the intermediate parts firmly, positively, and securely in their position.

To secure a perfect bearing and proper clamping effect, I heat the yokes before applying them to the blocks, and then drive the yokes and blocks upon the frog to the proper position, hammering the ends of the yokes so as to forge them to aperfect it upon the blocks,

after which, upon the cooling of the yokes, the parts will all be clamped together under greater pressure than could otherwise be obtained, and without anyliability Of movement or play between the parts.

Owing to the sockets within the yokes the latter are prevented from being forced from the blocks, and the slipping of the blocks upon the rails may be prevented by means of bolts or other devices. One means which is effective consists of malleable-metal plates or rods f, bent at their inner ends to fit openings in the webs and adapted to recesses t' inthe blocks G, so that the latter may be driven into place without displacing the rods f, the outer ends of which may be bent outward, as shown, the said rods thus acting as keys, securely holding the blocks in place. By bending down the ends of the rods the bloc-ks, with their yoke, may be driven toward the contracted part of the frog when the latter has to be dismembered.

It will be obvious that the form of the yoke and blocks will depend, to some extent, upon the particular construction and arrangement of the rails of the frog, and it will be seen that the sockets may be V-shaped Or of other form, with corresponding blocks G.

lVithOut limiting myself to the precise coustruction and arrangement of parts shown, I claim l. The combination, with the parts of a railway-frog, of blocks lying against the outer' rails, and yokes shrunk upon the blocks to clamp the parts together, substantially as specified.

2. A railway-frog in which the parts are confined between side blocks, and yokes having turned-up ends socketed to receive the Outer portions Of the blocks and shrunk upon the blocks, substantially as described.

3. The within-described improvement in connecting together the parts of a railwayfrog, the same consisting in applying blocks to the outer faces of the outer rails, and applying to said blocks heated yokes and shrinking them upon the blocks, substantially as described.

In testimony whereof I have 'signed my name to this specification in the presence of two subscribing witnesses.

Witnesses: WILLIAM E. BLAKSLEE.

WM. A. CHAPMAN, F. W. SNOW.

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